"The flotation response of a lead ore was measured by utilization of a computer driven data acquisition system. A symmetric, fast and automatic froth removal and weighing system was attached to a conventional laboratory flotation cell. The rate controlling mechanisms were identified by manipulation of the froth removal rate, (FRR), froth layer thickness, (FT), and air flow rate, (AFR). The production of froth, water, solids and value in addition to value recovery and concentrate grade were determined as a function of time of flotation.
The flotation response was controlled by events dependent of AFR when using shallow froths of less than 0.5 cm FT and 50 rpm or higher FRR. The rate limiting stage was FRR at intermediate AFR and low FT. Conversely, when the FRR was decreased or the FT augmented, the global rate controlling mechanism was bubble emergence within the froth.
Statistical non-linear regression analysis of the experimental galena recovery data to various kinetic models showed that Huber's and Klimpel's models had the best agreement as compared to a first order model. This suggests that the floatability of galena is linearly proportional to its particle size.
The effect of AFR, FT and FRR on the Huber's model rate constant was also studied. These findings and the effects on the recovery, grade and kinetics are explained on the basis of coalescence, drainage and entrainment mechanisms. Finally, the cleaning action of the froth was found to be essentially dependent on the froth residence time"--Abstract, pages ii-iii.
Watson, John L.
Morris, Arthur E., 1935-
Materials Science and Engineering
M.S. in Metallurgical Engineering
University of Missouri--Rolla
x, 125 pages
© 1987 Jose Antonio Barrera-Godinez, All rights reserved.
Thesis - Open Access
Print OCLC #
Link to Catalog Record
Barrera-Godinez, Jose Antonio, "The use of computerized data acquisition techniques to measure the kinetics of a batch flotation process" (1987). Masters Theses. 516.